Apparatus for providing graphical images on cathode-ray tubes

ABSTRACT

A PHOTOTYPESETTING METHOD AND APPARATUS UTILIZING A CATHODE-RAY TUBE TO DISPLAY CHARACTERS ONE AT A TIME ON THE FACE THEREOF FOR PHOTOGRAPHIC RECORDATION EMPLOYS AN OPTICAL CHARACTER DISC HAVING FORMED THEREON A FONT OF CHARACTERS IN THE FORM OF A PLURALITY OF BINARY BITS REPRESENTED BY OPTICAL MARKS. THE CHARACTER DISC IS USED IN CONJUNCTION WITH CONTROL SIGNALS FROM A CONTROL RECORD TO FORM CHARACTERS OF VARIOUS SIZES ON THE CATHODE-RAY TUBE. A BUFFER MEMORY CIRCUIT ACCEPTS INFORMATION IN PARALLEL FORM FROM THE CONTROL RECORD, CONVERTS THIS INFORMATION INTO SERIAL FORM, STORES THIS INFORMATION UNTIL IT CAN BE USED BY THE TYPSETTING SYSTEM, AND THEN RECONVERTS IT TO PARALLEL FORM FOR UTILIZATION BY A DECODER CIR-   CUIT WHICH PROVIDES THE SIGNALS NECESSARY FOR THE CONTROL FOR VARIOUS TYPESETTING OPERATIONS AND FOR THE SELECTION OF THE CHARACTERS TO BE DISPLAYED. ELECTRONIC CIRCUITS COMPENSATE FOR THE NONLINEARITIES IN THE CATHODE-RAY TUBE TO PERMIT CHARACTERS TO BE FORMED ON THE FACE THEREOF IN PROPERLY SPACED RELATION AND WITHOUT DISTORTION REGARDLESS OF THEIR POSITION ON THE TUBE. OTHER ELECTRONIC CIRCUITS ARE EMPLOYED FOR THE GENERATION OF THE CHARACTERS AS CONTROLLED BY THE BINARY BITS ON THE CHARACTER DISC, FOR CONTROL OVER THE CATHODERAY TUBE INTENSITY, AND FOR LEADING OF THE PHOTOGRAPHIC RECORDING MEDIUM.

United States Patent [72] Inventors Edwin R. Kolb;

John F. Blaha, Cleveland; Webster C. Roberts. South Euclid. all of Ohio [21] Appl. No. 591,734

[22] Filed Nov. 3, 1966 [45] Patented June 28, 1971 [73] Assignee Harris-lntertype Corporation Cleveland, Ohio [54] APPARATUS FOR PROVIDING GRAPHICAL IMAGES ON CATHODE-RAY TUBES [5 6] References Cited UNlT ED STATES PATENTS 2,765,211 10/1956 Brinst'er et al. 346/107 3,008,372 11/1961 Willey et a1 346/107X 3,150,914 9/1964 Wilson et a1. 346/107 3,218,945 11/1965 O'Brien et a1... 95/45 3,267,454 8/1966 Schaaf 340/324 Primary ExaminerDaryl W. Cook Attorney-Yount & Tarolli ABSTRACT: A phototypesetting method and apparatus utilizing a cathode-ray tube to display characters one at a time 'on the face thereof for photographic recordation employs an optical character disc having formed thereon a font of characters in the form of a plurality of binary bits represented by optical marks. The character disc is used in conjunction with control signals from a control record to form characters of various sizes on the cathode-ray tube. A buffer memory circuit accepts information in parallel form from the control record, converts this information into serial form, stores this information until it can be used by the typesetting system, and then reconverts it to parallel form for utilization by a decoder circuit which provides the signals necessary for the control of various typesetting operations and for the selection of the characters to be displayed. Electronic circuits compensate for the nonlinearities in the cathode-ray tube to permit characters to be formed on the face thereof in properly spaced relation and Without distortion regardless of their position on the tube. Other electronic circuits are employed for the generation of the characters as controlled by the binary bits on the character disc, for control over the cathode-ray tube intensity, and for leading of the photographic recording medium.

PATENTED Jun 28 Ian SHEET 01 HF 20 oooooooo0ooooooooooo QOOOOOOOOO [lllllll [NW [NW NW INVENTORS EDWIN R. KOLB,

BY JOHN F. BLAHA a WEBSTER c. ROBERTS a Mg ATTORNEY PATENTEU JUH28 I971 SHEET 02 BF SCHMITT SICHMITT I TRIGGER TRIGGER M- FF Q FF bs? 76X 1 -83 READER 90 72 75 RESET REGISTERS 0 CORRECTION 2 QBE SYSTEM a CONTROL LL -98 INVERTERS TAPE j 95 w T READER 66 FEED DELETE STOP CODE 8 DETECTOR DETECTOR DETECTOR g 1 FL 96 i 97 I FROM START" STOP FIG? LOGIC a b A l l l 1 l v TO TAPE l READER REsET CONTROL 90 FROM TAPE READER PATENTED JUN28 I91 SHEET 03 HF 20 PATENTEUJUMQSIW; 3,588,870

sum on M 20 4--TAPE H0!) lllx/ 40- n 20- 1:1 :1 [3' c1 :1 [:1 |o-- 1:1 1:1 1:1 1:: n :1 D c: u I: m [:1 1:1 4 E1 E1 [:1 I: E! D a 1: E] u u 2- :1 m :1 a I: r: :1 1 E] m El [:1 [:1 E] [I E] I] lllllllllllllillll I60| IO I026 03 I6 IO I6 0552 |63407O| 2 2 535 READER PREFIX-PREFIX HORIZONTAL SPACE WRITE WORD SPACE COMMAND CHARACTERS SEPARATOR T Q SET SMALL POINT SIZE FIG I3 395 INPUT INPUT 400 A A 400 s q\N\r-0 337, 343, 345, 347 520 F6 20 255? T x 1, 1 s

SPACE MEMORY FROM 522 DECODER INDENT MEMORY FIG-l2. L 523 J POINT 52/ T SIZE 255 MEMORY 1 5.?4 5.325 FROM 4/2 GENERATOR HORIZ. COUNTER COUNTER Fl 6- l4 J E T I '2 527 528 L80 INTERPOLATION MAIN COUNTER COUNTER I W T0 T0 SELECT ONE OF INTERPOLATION 64 HORIZONTAL D/A CARD D/A CARD FIG-23 FIG-22 PATENIED JUH28 I91;

SHEET 07 F 202 FIG HB 3586 BIT, I793 ms DELAY LINE NO.1 SAMPLING I GATES A 326 BIT, I63 ms ,209 I PARALLEL DELAY LINE 203 I To 206 200 SERIAL 3586 BIT, l793ms me DELAY D LAY LINE No.2 W & PARALLEL CoNTRo L gggga TO SERIAL 1/205 CoNvERTER 234 3586 BIT I793 ms N EGI ER I C- COUNTER /a/ 178 L: 1 me 235 CHARACTER 3586 BIT, I793 ms 5 SENSOR ,7 COUNTER j 229 L "/93 v99 /6/ /79 326 BIT I63 ms COUNTER F L I Q OUTPUT REGISTERS p I I I I 2/2 I OUTPUT I CHARACTER SENSOR l i I A l 225 L 234x 2/8 I 3 F' 7 222 3 5 I I L L E J 23 20 I 2/6 CHARACTER J SAMPLING SERIAL To SHIFT GATES SERIAL 2 PARALLEL FROM CoNTRoL TO PARALLEL SHIFT I K I I REGISTER DECODER 230 232 FIG-IZA PATENTEU JUH28 TBYi SHEET [18 [1F 20 m E E F M O R W PREFIX REGISTER FIG- I2A RE T SHIFT CONTROL Fl RST REGISTER CHARACTER B d W F PATENIED JUH28 Ian SHEET 09 0F 2() SET LEADING OUTPUT LEADING F HORIZ.

I FEED 5%? INDENTI FROM RESET FIG-2| IIcIJIIIII IJIII 6 4 2 7 PULSE 26/ 2 INHIBIT FROM FIGZG ATENTEU JUH28 IHYl SHEET 11 0F 20 (MTG-u IAI BE;

PATENTEU JUN28 |9n SHEET 12 OF 20 FIG-l8 MINOR VERTICAL VOLTAGE MINOR HORIZONTAL VOLTAGE 64 STEPS DER R O EM w mww N FRC U W U T m M m m G D 7 Y M M T O K N M C C m M A F P 0 M F 9 T T 7 7 L 5 w F 7! B 4 7 F F 7 4 F MW 4.? 7 i L? E W 7 v 5. 5 5 4 w w u m a 7 6 7 7 x 7 7 f 1 A/ o a 3 m 7 L17 I 7 L w L a M 5 5 53 94 2 2 6 a 34 03 Z 5 7i I w 2 m 2 2 2 W W W M4V E G .V 1' 7 5F? 3O I. 7\ a A 4 6 F m m m H PATENTEU JUH28 1971 3,588,655 0 sum 15 (1F 20 FIG-ZIC STORAGE COUNTER 7. INTERPOLATION COUNTER 526 LEAST SIGNIFICANT DIGIT COUNTER PATENTEU JUH28 l97i SHEET 18 0F 20 FlG-2ID FIG.

FIG.

FIG. 21 A FIG.

FIG-21E SHEET 18 0F 20 PATENTEUJUN28I97 zorrowJm we we? kmm 'F" HP- NN QE 20mm d mwm MN OE PATENTED JUH2'8 |971 SHEET 18 [1F 20 TO CHARACTER GENERATOR FROM (FIG-l7) NOR CHARACTER GENERATOR II: (FIG-l7) FIG- 24 FROM MAJOR DEFLECTION D/A (FIG-22) MEMORY (FIG-ZIA) FIG-Z5 OM NT lZE OR 2|A 

